Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1990-02-15
1991-01-08
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324 96, 324158D, 324 731, 324158F, 356364, G01R 3128, G01J 400
Patent
active
049839110
ABSTRACT:
A two-dimensional image of the voltage distribution across a surface at a large plurality voltage test points of a panel under test is extracted by illuminating the surface with an expanded, collimated beam of optical energy of a known polarization state through an electro-optic modulator crystal, such as KDP, wherin the crystal is disposed to allow longitudinal probing geometries such that a voltage on the surface of the panel under test causes a phase shift in the optical energy (the electro-optic effect) which can be observed through an area polarization sensor (a polarizing lens) for use to directly produce a two-dimensional spatially-dependent power modulation image directly representative of the spatially corresponding voltage state on the surface of the panel under test. Surface cross-talk is minimized by placing the face of the crystal closer to the panel under test than the spacing of voltage sites in the panel under test. The device may operate in a pass-through mode or in a reflective mode. An etalon may be used to enhance sensitivity.
REFERENCES:
patent: 4523847 (1985-06-01), Bjorklund et al.
patent: 4618819 (1986-10-01), Mourou et al.
patent: 4758092 (1988-07-01), Heinrich et al.
patent: 4855591 (1989-08-01), Nakamura
patent: 4862075 (1989-08-01), Choi
patent: 4875006 (1989-10-01), Henley et al.
patent: 4906922 (1990-03-01), Takahashi et al.
patent: 4910458 (1990-03-01), Forsyth et al.
Karlsen Ernest F.
Nguyen Vinh P.
Photon Dynamics, Inc.
LandOfFree
Voltage imaging system using electro-optics does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Voltage imaging system using electro-optics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voltage imaging system using electro-optics will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-937092